Photometric Redshift Calibration for LSST

Details Photometric Redshift Calibration for LSST Photometric Redshift Calibration for LSST

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21346009s&link_type=abstract

American Astronomical Society, AAS Meeting #213, #460.09; Bulletin of the American Astronomical Society, Vol. 41, p.368

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The proper calibration of photometric redshifts is of the utmost importance for the LSST, as many cosmological measurements depend critically on knowledge of the underlying redshift distribution. We examine how the use of different photometric redshift estimators affect the prediction of the photoz distribution. The great depth of LSST imaging will enable measurements of galaxies over a significant portion of cosmic time, during which the galaxies will undergo substantial evolution. We investigate how the inclusion of supplemental photometric and spectroscopic measurements can improve photoz estimators with tighter constraints on galaxy distribution and evolution models. We also explore measuring the true galaxy redshift distribution by cross-correlating galaxies in photoz bins with a bright subsample with known spectroscopic redshifts.

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